The Importance of Deep Watering Trees in August

August can be one of the toughest months of the year for your trees. The combination of high temperatures, long days, and often reduced rainfall means your trees are working overtime to stay healthy. One of the best ways to help them is deep watering.

By August, many trees are already stressed from summer heat. Shallow, quick watering or relying on rain alone often isn’t enough. Without adequate water reaching the deeper roots, trees can drop leaves prematurely, become more vulnerable to pests and disease, and suffer long-term root damage.

Deep watering means applying water slowly and steadily so it soaks 8 to 12 inches into the soil, reaching the tree’s major root zone. It’s the opposite of a quick splash from the hose — think of it like slowly filling a sponge instead of just wetting the surface.

The benefits of deep watering in August are significant. It prevents heat stress by keeping the root zone cool and hydrated, helping trees maintain normal growth despite the summer heat. It encourages deep root growth because shallow watering leads to shallow roots that dry out quickly, while deep watering trains roots to grow downward, making them stronger and more drought-resistant. It also improves drought tolerance, allowing trees to withstand dry spells better and bounce back faster when rain returns. Finally, it supports long-term health so trees are better prepared for fall growth and winter dormancy.

To deep water correctly, water slowly using a soaker hose, drip irrigation, or by letting your hose trickle at the base of the tree for 30 to 60 minutes. Focus on the root zone, which is generally from halfway between the trunk and the drip line, out to just past the drip line. Water in the morning to reduce evaporation and let the tree absorb moisture during the day. In August heat, aim for deep watering once or twice a week, depending on soil type and weather.

If you’re not sure if your tree is getting enough water, try the screwdriver test. Push a long screwdriver into the soil near the root zone. If it goes in easily for 8 to 12 inches, the soil has enough moisture. If not, it’s time to water deeply.

Think of August deep watering as an investment the time you spend now helps your trees survive summer stress and thrive for years to come. Healthy roots mean a healthy tree, and healthy trees mean shade, beauty, and value for your property.